Jointed piston-head packing-ring.



N0. 768,136. I v v PATENTED AUG. 23, 1904.

J. MURPHY.

JOINTED PISTON HEAD PACKING RING.

APPLIOATION FILED MAY 11. 1903. N0 MODEL.

: E i E g i 11 lmullnlmm" 1 7' a .1 I F. J zy A W/TA/[S $59. I[AWE/V705,

. Jbim p y Patented. August 23, 1904.

PATENT owns. 4 I

JOHN MURPHY, OF PARSONS, KANSAS.

JOINTED PISTON-HEAD PACKING-RING- SPECIFICATION forming part of LettersPatent No. 768,136, dated August 23, 1904.

Application filed May 11, 1903. Serial No. 156,546. (No model.) I i Toall whom it may concern.-

Be it known that I, JOHN MURPHY, a citizen of the United States,residing at Parsons, in the county of Labette and State of Kansas, haveinvented new and useful Improvements in Jointed Piston-HeadPacking-Rings, of

whichthe following is a specification.

invention consists inthe combination of three or more packing-segmentswith an interior spring which presses outwardly against the segments. p

The advantages of my herein-described packing over the usual one-piecepacking-rings are: With my packing the pressure of the packing upon thecylinder is much less. With my packing the pressure of the packing uponthe cylinder is equal at all points of its periphery, and hence neitherthe packing nor the cylinder will be unequally worn away bythe'reciprocation of the piston, which unequal wear is a serious faultof the old-style one-piece packing-rings.

My invention possesses further advantages, which it is not necessary toexplain.

My invention is completely illustrated in I the accompanying drawings,in which- Figure 1 is an elevation of a packing-ring embodying myinvention. Fig. 2 is an edge view of the same. Fig. 3 is a sectionalview of a part of a-piston-head provided with my packing. Fig. 4represents the ends of the packing-spring, the adjacent portion of thebull-ring, and a pin projecting from thelatter I between the ends of thespring.

itsspring 5.

wet emery-powder between them while in the cylinder. These processesinsure that the said joints between the segments will be 5 steam-tightwhen the ends of the segments are in contact.

Within the packing-ring is forced a 0- shaped steel spring 5. When free,the diameter of this spring is about one-quarter larger than that of thepacking-ring. The ends of said spring are bent outwardly and areinserted in the recesses 3 inthe ends of the packing-segments. Theelasticity of said spring not only forces the segments I outwardlyagainstthe cylinder, but presses them vtogether at their joints 4. Thusa small gap I 6 will be left between the ends of the recessed segments.This gap is placed at the bottom of the cylinder when the bull-ring 7,Figs. 3 I

and 4, is in steam-tight contact with the cylinderI The packing-groovesin the bull-ring are about one-eighth inch deeper than the combinedthickness of the packing-ring and In Fig. 3 the packing-rings projectfrom the piston, as the cylinder is not shown.

. sesses the advantages mentioned hereinbefore,

and is inexpensive to construct and reliable in 5 its operation.

Aplurality of nested O-shapedsprings may be substituted for the singlespring 5 without departing from the spirit and scope of my invention.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent of the United States, is

The combination \Vl'tll a bull-ring, of a packing-ring comprising aplurality of segments, recesses cut in the meeting ends of two of saidsegments, a C-shaped spring confined Within g T W v said ring, the endsof said spring being bent 1011b B In outwardly into said recesses, and apm secured \V1tncsses:

to the bull-rmg and pr03ecting between the \V. D. ATKINsON,

.In testimony whereof I ailix my signature in the presence of twowitnesses.

ends of said spring, substantially as described. LAURA Bnom: ERG.

